The Seven Deadly Sins: IDLE Base Defense Phase 2 Guide

To reach Wave 100 in Base Defense Phase 2 of The Seven Deadly Sins: IDLE, replace single-target damage dealers with low-cooldown area-of-effect (AOE) heroes, stagger your formation to cover lane edges, and equip your primary damage dealers with critical hit rate and critical damage gear.

Team Composition and Skill Selection

High enemy volume makes single-target damage inefficient in late waves. Your squad must clear incoming groups quickly before mobs reach your base perimeter.

Primary Damage: Select heroes with low skill cooldowns and multi-target capabilities that scale with enemy density.
Support and CC: Include at least one hero with defensive buffs or crowd control (slows, knockbacks, stuns, or freezes) to interrupt enemy movement while skill cooldowns reset.
Budget Alternatives: If high-rarity AOE units are unavailable, lower-rarity heroes with consistent crowd control can stall enemies long enough for your main DPS to clear the screen.

Staggered Lane Positioning

Clumping units in the center creates blind spots along the map edges, allowing fast or resilient mobs to bypass your main kill zone.

Front-Line Aggro: Place your most durable defensive heroes at the front perimeter to absorb initial attacks.
Staggered Rear Line: Position your primary AOE units slightly behind the tanks in a staggered layout to ensure overlapping field-of-fire coverage across all lanes.
Mid-Battle Adjustments: If a damage dealer takes critical damage early, move their starting position further back to extend survival without losing their skill coverage.

Troubleshooting and Stat Optimization

Run Issue	Diagnostic Trigger	Recommended Adjustment
Early Base Damage	Base health drops before Wave 50	Add a healer, defensive buffer, or crowd control hero.
Timer / Clear Deficit	Base is secure, but enemies survive initial skill rotations	Swap out defensive support for an additional AOE attacker.
Late-Wave Mob Scaling	Enemies overwhelm defense past Wave 80	Re-gear primary AOE heroes for Critical Hit Rate and Critical Damage, and upgrade the main DPS unit's equipment first.